Carpeting wet around basement floor drain, not raining
My carpet is wet in a 18 inch diameter circle around my basement floor drain. The weather has not been rainy at all, not for at least a week. Does this mean I'm getting back up from inside my house? It does not have a sewer odor.
What would be the first trouble shooting someone would suggest or should I just call the plumber?
I think this has happened at least once before because some papers in that corner got wet. I never saw the back up, just found the water damaged papers later.